It is where we are buried and risen with Christ into a new man.
It is after baptism in which we receive the gift of the Holy Spirit (just as when Christ was baptized)
So baptism is necessary for salvation.
How many times must we be baptized? Once, if for the correct reason.
How should we be baptized? Total submersion.
Below are all the verse pertaining to baptism;
1 Peter 3:21 and this water symbolizes baptism that now saves you also—not the removal of dirt from the body but the pledge of a clear conscience toward God. It saves you by the resurrection of Jesus Christ,
Acts 10:48 So he ordered that they be baptized in the name of Jesus Christ. Then they asked Peter to stay with them for a few days.
Acts 22:16 And now what are you waiting for? Get up, be baptized and wash your sins away, calling on his name.’
Colossians 2:12 having been buried with him in baptism, in which you were also raised with him through your faith in the working of God, who raised him from the dead.
Galatians 3:27 for all of you who were baptized into Christ have clothed yourselves with Christ.
Mark 16:16 Whoever believes and is baptized will be saved, but whoever does not believe will be condemned.
Luke 3:21 – 22 When all the people were being baptized, Jesus was baptized too. And as he was praying, heaven was opened 22 and the Holy Spirit descended on him in bodily form like a dove. And a voice came from heaven: “You are my Son, whom I love; with you I am well pleased.”
Matthew 28:19-19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.”
Acts 8:36 – 36 Now as they went down the road, they came to some water. And the eunuch said, “See, here is water. What hinders me from being baptized?”
37 Then Philip said, “If you believe with all your heart, you may.”
And he answered and said, “I believe that Jesus Christ is the Son of God.”
38 So he commanded the chariot to stand still. And both Philip and the eunuch went down into the water, and he baptized him. 39 Now when they came up out of the water, the Spirit of the Lord caught Philip away, so that the eunuch saw him no more; and he went on his way rejoicing. 40 But Philip was found at Azotus. And passing through, he preached in all the cities till he came to Caesarea.Ephesians 4:4-6; 4 There is one body and one Spirit, just as you were called to one hope when you were called; 5 one Lord, one faith, one baptism; 6 one God and Father of all, who is over all and through all and in all.
Acts 2:38-41: 38 Peter replied, “Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. 39 The promise is for you and your children and for all who are far off—for all whom the Lord our God will call.” 40 With many other words he warned them; and he pleaded with them, “Save yourselves from this corrupt generation.” 41 Those who accepted his message were baptized, and about three thousand were added to their number that day.
Romans 6:3-18: 3 Or don’t you know that all of us who were baptized into Christ Jesus were baptized into his death? 4 We were therefore buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life. 5 For if we have been united with him in a death like his, we will certainly also be united with him in a resurrection like his. 6 For we know that our old self was crucified with him so that the body ruled by sin might be done away with, that we should no longer be slaves to sin— 7 because anyone who has died has been set free from sin. 8Now if we died with Christ, we believe that we will also live with him. 9 For we know that since Christ was raised from the dead, he cannot die again; death no longer has mastery over him. 10 The death he died, he died to sin once for all; but the life he lives, he lives to God. 11 In the same way, count yourselves dead to sin but alive to God in Christ Jesus. 12 Therefore do not let sin reign in your mortal body so that you obey its evil desires. 13 Do not offer any part of yourself to sin as an instrument of wickedness, but rather offer yourselves to God as those who have been brought from death to life; and offer every part of yourself to him as an instrument of righteousness. 14 For sin shall no longer be your master, because you are not under the law, but under grace. 15 What then? Shall we sin because we are not under the law but under grace? By no means! 16 Don’t you know that when you offer yourselves to someone as obedient slaves, you are slaves of the one you obey—whether you are slaves to sin, which leads to death, or to obedience, which leads to righteousness? 17But thanks be to God that, though you used to be slaves to sin, you have come to obey from your heart the pattern of teaching that has now claimed your allegiance. 18 You have been set free from sin and have become slaves to righteousness.
Acts 8:13 Then Simon himself believed also: and when he was baptized, he continued with Philip, and wondered, beholding the miracles and signs which were done.
Acts 9:18 And immediately there fell from his eyes as it had been scales: and he received sight immediately, and arose, and was baptized.
Acts 18:8 Crispus,the leader of the synagogue, believed in the Lord with all his household, and many of the Corinthians when they heard were believing and being baptized.
Acts 10:48 “And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days.”